The Libyan leader, Muammar Gaddafi, is under growing pressure at home and abroad after his supporters reacted with violence overnight against anti-government protests in the capital, Tripoli. Witnesses say warplanes have fired on protesters in Tripoli. Human Rights Watch says more than 230 people have been killed since the unrest began last week. Anchor Lisa Mullins speaks with Mohammed Yehia, editor of the BBC's Arabic online. 

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